Iwan Nyotowidjojo, M.D.
NPI 1578976270 · Internal Medicine Physician · Rancho Santa Margarita, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Iwan Nyotowidjojo, M.D. is a Internal Medicine Physician provider in Rancho Santa Margarita, CA (NPI 1578976270).
Provider details
- NPI number
- 1578976270
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 45679 (AL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
147 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 42 | $91 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 39 | $6 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 29 | $119 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, Each Additional 20 Minutes99458 | 20 | $37 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes99457 | 17 | $46 |
Typical Medicare-allowed amounts for these services range $6–$119 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 94 | 33 |
| Amlodipine Besylate | 82 | 29 |
| Atorvastatin Calcium | 79 | 33 |
| Levothyroxine Sodium | 53 | 19 |
| Lisinopril | 47 | 26 |
| Losartan Potassium | 43 | 16 |
| Pantoprazole Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-06-10
- Last updated
- 2024-07-17
- Certified
- 2024-07-17
Frequently asked questions
- What is Iwan Nyotowidjojo's NPI number?
- Iwan Nyotowidjojo's National Provider Identifier (NPI) is 1578976270, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Iwan Nyotowidjojo's specialty?
- Iwan Nyotowidjojo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Iwan Nyotowidjojo located?
- Iwan Nyotowidjojo's practice location on file with NPPES is 29472 Avenida De Las Banderas, Rancho Santa Margarita, CA 92688.
- What is Iwan Nyotowidjojo's phone number?
- The practice phone number listed in the NPPES registry for Iwan Nyotowidjojo is (949) 459-9968.
- Does Iwan Nyotowidjojo accept Medicare?
- Iwan Nyotowidjojo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Iwan Nyotowidjojo's NPI active?
- Yes — Iwan Nyotowidjojo's NPI (1578976270) is active in the NPPES registry as of the last update on 2024-07-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.